Timer for internal combustion engines



Oct. 23, 1934. J. F. MARTIN 1,978,152

TIMER FOR INTERNAL COMBUSTION ENGINES Filed Oct. 7, 1933 2 Sheets-Sheet1 INVENTOR To/u; E 2 /8/77 ATTORNEY.

Oct-23, 1934. J F MARTW 1,978,162

TIMER FOR INTERNAL COMBUSTION ENGINES Filed Oct. 1933 2 Sheets-Sheet. 2

I BY g 13 57 ATTORNEY.

Patented Oct. 23, 1934 a i UNITED STATES PATENT OFFICE TIMER FORINTERNAL COIIBUSTION ENGINES John F. Martin, Springfield, Mass assilnorto United American Bosch Corporation, Springfield, Mass., a corporationof New York Application October 7, 1933, Serial No. 692,593

6 Claims. (Cl. 123-148) My invention relates to timers for the ignitiona conductor strip 12 embedded in a cap 13 for circuits of internalcombustion engines. the casing and leading to a central brush 14 Anobject of this invention is to provide a timer onthe inside of this cap.This terminal 14 enwith a housing enclosing a low tension circuit gagesa spring conductor 15 on the rotor 6, which 5 breaker and a distributor,and a cover for an igniis also of insulation and this rotor carriesthereon tion coil secured on the casing; the entire cona brushorterminal 16. A rivet 17 embedded in struction being compact andsimple, easy to asthe arm 18 of the rotor secures the conductor 15semble and attach to the engine for which it is in contact with thebrush 16 and aflixes both to intended, and inexpensive to produce. therotor 6. Of course the cap 13 is of insulation.

10 The objects and advantages of the invention are The molded topofinsulation 11 has a recess 19 set forth in the ensuing description,but I reserve, opening through its lower face, and the end of of course,the right to,make changes in details the conductor 4 is exposed at thebottom of this that do not depart from the spirit of the inventionrecess to be engaged by a spring-pressed brush or exceed the scope andmeaning of the broad 20, ina socket embedded in the cap 13 and secured15 terms in which the claims are expressed. to one end of the conductor12.

rm the drawings: At 21 are shown fixed high tension terminals rig. 1 isan axial section through a timer accarried by the distributor casing 5through which cording to my invention; the circuit is closed in turn bythe brush 16. Figure 2 is a transverse section through a part Theseterminals extend through the casing 5 from 20 thereof showing thecircuit breaker; the inside to the outside; being hollow at their Fig. 3is a front view; outer ends and enclosed in hollow projections 22 Fig. 4is a top view thereof; and on the casing 5 to receive the ends of thehigh Figs. 5 and 6 show details. tension terminals leading to the sparkplugs.

The numeral 1 indicates a metal housing for The shaft 9 with driving key10 carries a gov- 25 the timer of suitable material on the top of whichernor comprising a loose plate 23 and a fixed plate is a cover 2containing the primary and secondary 24 between the breaker plate andthe closed end windings of a high tension ignition coil, one termiof thehousing. Attached to the plate 23 are govnal of the primary of this coilbeing connected ernor weights25 pivotally mounted on pins 26 to asuitable source of electrical energy associcarried by the plate 23.These governor weights 30 ated with the engine, and the other extremityof carry pins 27 which engage slots 28 of suitable the primary beingconnected to a terminal 3 by shape in the plate 24. The cam 8 is rigidwith which it is joined to the interrupter or circuit the shiftableplate 23 so that when the speed inbreaker of the timer in the housing 1.Of the creases the cam is advanced with respect to the secondary coil,oneend will b grounded in the shaft 9.

35 usual way, and the other end will be joined to a The cover 2 issecured in place by screws 29 brush or suitable terminal 4 adjacent thebase of passing through openings in the lower part 30 of the cover 2 toenable high tension current to be the cover 2 and top 11 into engagementwith conducted to the distributor of the timer. The threaded bores inthe top of the housing 1. Becasing of the distributor is shown at 5.This castween the cover 2 and the top 11 is a packing ring 40 ing 5 aswell as the cover 2 will be preferably of 31 and the upper face of thetop 11 is counterbored some suitable insulating material, and inside ofslightly to receive a rim 32 on the cover 2. the casing 5 is the rotor 6of the timer. The sup- The top of the housing 1 has an extension 33 onporting plate for the circuit breaker is shown at which the moldedelement 11 rests and the top 7 in the housing 1 and it has a pair ofcontacts, of the housing has an opening 34 to give passage 45 one fixedand the other movable; the latter to be to the terminal 3. The front endof the housing 1 actuated by a cam 8 on a shaft 9 in the housing is openbut receives a disk 35 which fits against 1 so as to open the circuit ofthe timer at each aninside shoulder 36. The rim of the casing 5 instantof ignition. The shaft 9 is mounted in enters this end of the housingand abuts the disk 2. suitable bearing in the bottom or rear wall of 35.This disk has a keyway 37 in its periphery 50 the in 1 and is adapted tobe onnected by which engages a projection 38 in the housing and means ofa tongue 10 at its Outer end an D the casing 5 has a projection 39 whichalso enters ating shaft of the engine to rotate the cam 8 and thiskeyway and enables the casing 5 to be fitted rotor 6. The high tensionterminal4is embedded to the housing 1 in central position with the in amolded top 11 between the housing 1 and the sockets 22 at each side ofthe timer. The sup- 55 bottom of the coil cover 2. It is connected withporting plate 7 for the interrupter fits against a shoulder 40 betweenthe governor and the disk 35 and has an opening to give clearance to thecam 8. This plate 7 is held against the shoulder 40 by a spring ring 41which is received in an inside groove in the housing 1.

The plate 7 has secured to the face thereof by one or more rivets apiece of insulation 42. At 43 is an interrupter lever preferably ofmetal having a contact at one end and mounted between its ends on apivot stud 44 afllxed to the plate '7. Adjacent the other end is theusual rubbing block to be engaged by the earn 8 and at 45 is a springwhich 'is affixed to said other extremity of the lever 43 and to theinsulation 42, the lower end of the terminal 3 being connected to thisspring. A terminal on the end of the lever 43 engages a fixed terminal46. Preferably the lever 43 is insulated from its pivot stud 44 and thefixed terminal 46 is grounded on the plate 'I. Then the primary circuitis opened whenever the cam 8 moves the lever 43 to disengage its contactfrom the contact 46.

At the side of the housing 1 adjacent the plate 7 is an opening 47 whichis closed by a curved strip of metal 48 on the outside of the housing.One end of this strip passes through an opening 49 and engages the innerface of the housing and the other end is made fast by a screw 50. Whenthe screw 50 is taken out, the opening 47 can be uncovered forinspection and repair of the circuit breaker.

The housing 1 has at the closed end thereof a flange 51 with openingsfor mounting screws. The molded top 11 has a socket 52 to receive acondenser 53 and at 54 is a conductor united to the insulated pole ofthe condenser to be properly connected to the same terminal of theprimary winding that leads to the circuit breaker and thus bridge thebreaker contacts. The molded top 11 has a projection 55 in which islocated the recess 19 and the cap 13 may have a thickened portion 56 inwhich the strip 12 is embedded. At 57 are spring clips pivoted to thesides of the housing 1 in position to engage the cap 13 and hold thiscap in place.

The lower end of the supporting plate 7 may have a notch therein toreceive the inturned end of an adjuster plate 58 which passes through anopening 59 in the bottom of the housing 1. This element 58 holds theplate 7 in a position of fine adjustment. It is punched to provide apivot 60 which fits into an opening 61 to enable the inturned end ofthis element 58 to be turned somewhat in the recess 59 and it is heldfast by means of a screw 62. This screw passes through an enlargedopening in the element 58 so that the element can be moved sidewise withrespect to this screw 62 and locked in desired position. Said opening isindicated at 63 in the form of a slot in the element 58 and the inturnedend of this element engaging the timer plate is indicated at 64.

The coil 65 in the cover 2 comprises primary and secondary windings withinsulating pieces 66 at the ends and a central laminated core consistingof strips of magnetic material 67. This core is substantially parallelto the top 11. At its ends the strips are bent laterally towards eachside of the coil against the insulating pieces 66.

At 68 is an insulating tube which may rest on the top 11 and support thecore and coil. The inside of the cover 2 may have a shoulder 69 whichengages the outer ends of the core, and holds the coil between it andthe tube 68. The insulation pieces 66 of course are perforated to letthe ends of the laminations of core 67 go through them before bending.

Having described the invention what is claimed is:

1. A timer comprising a housing, a top of molded insulation on thehousing, a coil on said top, a cover for the coil, a distributor casingmounted on the housing, a cap for said casing, embedded conductors inthe top and the cap to convey current from the coil to the distributorcasing, said top having a recess, and the cap having a projection toenter said recess, the ends of said conductors being in engagementwithin said recess.

2. A timer comprising a housing, a circuit breaker plate within thehousing, an adjuster element on said housing, said element being pivotedto the exterior of the housing, said housing having an opening throughwhich an end of the element projects, the circuit breaker plate having arecess receiving said end, said element having a transverse slot thereinbetween said end and the pivot point and a fastening bolt engaging thehousing and passing through said slot. 3. A timer comprising a housing,a circuit breaker plate therein, and an adjusting element pivotallymounted on the housing to maintain the plate in desired position, saidelement having a pivot punched therefrom and an overturned end to engagesaid plate, and a transverse slot therein to give passage to a fasteningbolt.

4. A timer comprising a housing, a shaft having a bearing in one end ofthe housing, circuit breaking means encircling said shaft, a distributorcasing at the opposite end of the housing, a bearing disk in the housingbetween the distributor casing and the circuit breaking means, said diskhaving a key-way, a projection carried by the housing to engage thekey-way and a projection on the distributor casing to enter saidkey-way.

5. A timer comprising a housing, a molded insulating top on the housing,a coil on the top, a distributor casing on the housing, said casinghaving a projection to enter a key-way carried by a part of the housing,to hold the casing in proper position, a cap for the casing, circuitbreaking means in the housing, and enclosed connections leading from thecoil to the circuit breaking means and the distributor casing, saidconnections comprising conductors embedded in the top and cap.

6. A timer comprising a housing, a top of molded insulation on saidhousing, a coil on said top, a distributor casing, a hollow projectionextending laterally from said top and having a downwardly openingrecess, a conductor embedded in said top having an exposed part withinsaid projection, and conducting means projecting into contact .with saidexposed portion and connected to said distributor.

JOHN F. MARTIN.

